{

  const adom = document.querySelector("nav > a");
  const uldom = document.querySelector("nav > ul");
  adom.addEventListener("click", function(event) {
       uldom.classList.toggle("open");
  });

  const lidom = document.querySelector("nav > ul > li:nth-of-type(3)");
  const liuldom=document.querySelector("nav > ul > li > ul");
  lidom.addEventListener("click", function(event) {

        liuldom.classList.toggle("open1");
  });


}
